Android/iOS: Fitness trackers are a great way to gamify your fitness goals and compete with others. If you're motivated by helping others, free app Charity Miles helps you earn money while you run or bike.

Fitness trackers come in many shapes and sizes with varying capabilities and reviews, so it's tough to really be sure which one you should get. Lumoid's Try Before You Buy service lets you do just that so you don't fork over a lot of cash for a lackluster wearable tracker.

iOS 8 has a ton of new stuff, but one of the more confusing new features is Healthkit. After a shaky launch, apps can now integrate with Apple's own Health app. Let's take a look at some of the best apps for doing so and figure out exactly what Healthkit does.

Everyone is on the fitness tracking bandwagon. The Apple Watch will track your heartbeat, steps, and activity. The Fitbit and Fuelband have been doing similar things for years. But they aren’t perfect. At best, the data is good encouragement, but at worst, it's unreliable and misleading. Here's why all that data…

iOS: Fitness trackers are pretty easy to come by these days, but not many of them help you use the information they gather to get you to eat the right foods. Fuel My Run is a pretty simple app that tells you when to eat and drink.

iPhone: RunKeeper is one of your favorite running apps, and today it was updated with better support for the iPhone 5s. This means support for the M7 chip that gives you access to all your movement history.

Fitness tracking gadgets are everywhere. Even the upcoming Samsung Galaxy S4 smartphone will have a built-in fitness tracker. Whether they actually do any good is a hotly debated issue. Let's take a look at the types of people who benefit the most from fitness tracking gadgets and apps, and how how you can make yours…

Android: Fitocracy, your favorite fitness tracking service, took the wraps off of its Android app this week, giving Android users just the tool we all need to start the year off right. The app lets you track your activity on your phone, catch up with friends, and stay in touch with your groups and communities…

Android: If you need a little motivation to make it to the gym, you could always think about your health—or, with Fitsby, you can think about the money your friends will wave in your face if you skip out on your workouts. The app lets you wager with friends that you'll work out regularly, and when you do, you earn…

Android: Last year, Gympact for iPhone encouraged you to go to the gym by paying you real money for going, and charging you for skipping out. Now the app is available for Android users too, just in time for the new year.